/*******************************************************************************
 * Copyright (c) 2016 comtel inc.
 *
 * Licensed under the Apache License, version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 *******************************************************************************/
package org.lindom.proxy.common.rfb.codec.security.vncauth;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import org.lindom.proxy.common.rfb.codec.security.RfbSecurityDecoder;

import java.util.List;

public class VncAuthDecoder extends ByteToMessageDecoder implements RfbSecurityDecoder {

  @Override
  protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (!in.isReadable(16)) {
      return;
    }
    byte[] challenge = new byte[16];
    in.readBytes(challenge);
    out.add(new VncAuthSecurityMessage(challenge));
  }

}
